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United States Patent | 5,550,739 |
Hoffmann ,   et al. | August 27, 1996 |
A semi-active suspension control system comprises exclusively chassis acceleration sensors (S.sub.1 to S.sub.3) as sensors (1) for obtaining the information for the damping force control. The output signals of these sensors are analyzed in a filter (3), the transmission behavior of which is in linear approximation to the transmission behavior of a discrete Kalman filter, when concentrating on the frequency range between the natural chassis frequency and the natural wheel frequency.
Inventors: | Hoffmann; Michael (Frankfurt am Main, DE); Eckert; Alfred (Mainz-Laubenheim, DE) |
Assignee: | Alfred Teves GmbH (Frankfurt, DE) |
Appl. No.: | 401337 |
Filed: | March 9, 1995 |
Oct 26, 1990[DE] | 40 36 064.4 |
Current U.S. Class: | 701/37; 280/5.504 |
Intern'l Class: | G06F 019/00 |
Field of Search: | 364/424.05,508,572 280/707 |
5024302 | Jun., 1991 | Karnopp | 188/299. |
5034890 | Jul., 1991 | Sugasawa et al. | 364/424. |
Foreign Patent Documents | |||
0027869 | May., 1981 | EP. | |
0032158 | Jul., 1981 | EP. | |
0265670 | May., 1988 | EP. | |
0341883 | Nov., 1989 | EP. |
Hedrick et al., "Invariant Properties of Automotive Suspensions", International Conference on Advanced Suspensions, 24-25 Oct., 1988, The Institution of Mechanical Engineers, Birdcage Walk, London (GB), pp. 35-42. Karl Brammer, Gerhard Siffling, "Kalman-Bucy-Filter", Methods of Control Technology, 1975, pp. 75-83. |